Ubuntu20

Some gotchas when dealing with Ubuntu 20..

Adding static IP address with a bridge

- /etc/netplan/01-netplan.yaml

network:
  version: 2
  renderer: networkd
  ethernets:
    enp2s0f0:
      dhcp4: no
      addresses: [192.168.15.107/24]
      gateway4: 192.168.15.1
      nameservers:
        addresses: [192.168.15.1,1.1.1.1]
    enp2s0f1:
      dhcp4: no
  bridges:
    br0:
      interfaces: [enp2s0f1]
      addresses: [192.168.15.108/24]
      nameservers:
        addresses: [192.168.15.1,1.1.1.1]
      parameters:
        stp: true
        forward-delay: 4
      dhcp4: no
      dhcp6: no

Figure out what DNS server Ubuntu is configured to use

 systemd-resolve --status
Global
         DNS Servers: 192.168.15.176
          DNS Domain: iwillfearnoevil.com
          DNSSEC NTA: 10.in-addr.arpa
                      16.172.in-addr.arpa
                      168.192.in-addr.arpa